tests/01-self_files.sh: increase verbosity; Change the way to invoke test cases

Signed-off-by: Camber Huang <camber@poi.science>

Author: CamberLoid

tests/01-self_files.sh

@@ -14,7 +14,8 @@ abtest_self_files_test() {
 
     for i in "$SRCDIR"/autobuild/tests/T*.sh
     do
-        arch_loadfile $i
+        abinfo "Loading test case file ${i} and performing tests ..."
+        . $i
         abtest || abtest_non-zero-handler $? $i
         abtest_unprivileged || abtest_non-zero-handler $? $i
         unset abtest abtest_unprivileged